KR960031484A - Method for preparing styrene emulsion copolymer having small particle size and narrow distribution - Google Patents

Method for preparing styrene emulsion copolymer having small particle size and narrow distribution Download PDF

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Publication number
KR960031484A
KR960031484A KR1019950003462A KR19950003462A KR960031484A KR 960031484 A KR960031484 A KR 960031484A KR 1019950003462 A KR1019950003462 A KR 1019950003462A KR 19950003462 A KR19950003462 A KR 19950003462A KR 960031484 A KR960031484 A KR 960031484A
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South Korea
Prior art keywords
styrene
emulsion copolymer
weight
producing
parts
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KR1019950003462A
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Korean (ko)
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조교동
최용석
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김흥기
금호석유화학 주식회사
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Priority to KR1019950003462A priority Critical patent/KR960031484A/en
Publication of KR960031484A publication Critical patent/KR960031484A/en

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Abstract

본 발명은 작은 입자경과 좁은 분포도를 갖는 스티렌계 유화공중합체의 제조방법에 관한 것이다. 이 라텍스는 스티렌과 1가지 이사의 친수성 단량체를 조합하여 사용하고, 그 비율이 70∼80% : 30∼2%로 혼합된 혼성단량체를 성분으로 하는 공중합체이다. 혼성단량체의 5∼10%정도에 가교제를 반응기에 투입하고 승온한 후 중합온도에 도달했을 때 개시제를 일괄 투입하였다.The present invention relates to a method for producing a styrene-based emulsion copolymer having a small particle diameter and a narrow distribution. This latex is a copolymer comprising styrene and one type of hydrophilic monomer in combination and having a mixed monomer mixed at a ratio of 70 to 80%: 30 to 2%. The crosslinking agent was added to the reactor at about 5 to 10% of the hybrid monomer, and the temperature was increased, and when the polymerization temperature was reached, the initiator was collectively added.

초기 입자가 형성되는 시점은 5∼10분 후 잔여 혼성단량체를 빠르게 투입하여 폭주반응을 야기시켜 그 중합열로 반응속도 증가, 반응시갖 단축, 작은 입자경 및 좁은 분포도를 갖는 유화공중합체를 얻을 수 있게 하는 것이다.When the initial particles are formed, the remaining hybrid monomer is rapidly added after 5 to 10 minutes to cause a runaway reaction, and the heat of polymerization can increase the reaction rate, shorten the reaction time, and obtain an emulsion copolymer having a small particle size and a narrow distribution. It is to be.

Description

작은 입자경과 좁은 분포도를 갖는 스티렌계 유화 공중합체 제조방법Method for preparing styrene emulsion copolymer having small particle size and narrow distribution

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

Claims (6)

1종 이상의 친수성 단량체를 함유하는 스티렌계 공중합체의 제조방법에 있어서, 전체 혼성단량체량의 5∼10wt%의 혼성단량체가 함유된 반응용액을 중합온도까지 승온시키고 개시제의 일괄투입으로 빠르게 초기입자를 형성시킨 후 잔여 90∼95wt의 혼성단량체를 약 10분 이내로 투입하여 폭주반응에 의한 중합열로 빠르게 중합시켜 작은 입자성과 좁은 입자분포도를 갖게 하는 스티렌계 유화 공중합체의 제조방법.In the method for producing a styrenic copolymer containing at least one hydrophilic monomer, the reaction solution containing 5 to 10 wt% of the total amount of the hybrid monomer is heated to the polymerization temperature and the initial particles are rapidly added by the batch injection of the initiator. A method for producing a styrene-based emulsion copolymer which forms a residual 90 to 95wt% of a hybrid monomer within about 10 minutes and rapidly polymerizes it by heat of polymerization by the runaway reaction to form a small particle size and a narrow particle distribution. 제1항에 있어서, 친수성 단량체가 아크릴로니트릴아크릴산, 이타코닉산, 메타아크릴사, 메틸메타아크릴레이트, 부틸아크릴레이트인 스틸렌계 유화 공중합체의 제조방법.The method for producing a styrene-based emulsion copolymer according to claim 1, wherein the hydrophilic monomer is acrylonitrile acrylic acid, itaconic acid, methacrylic company, methyl methacrylate, butyl acrylate. 제1항에 있어서, 스티렌계 유화 공중합체가 스티렌계 라텍스인 스티렌계 유화 공중합체의 제조방법The method for producing a styrene emulsion copolymer according to claim 1, wherein the styrene emulsion copolymer is styrene latex. 제1항에 있어서, 입자경이 38nm이하이고 입자경 분포도 범위가 0.02∼0.15인 스티렌계 유화 공중합체의 제조방법.The method for producing a styrene-based emulsion copolymer according to claim 1, wherein the particle size is 38 nm or less and the particle size distribution range is 0.02 to 0.15. 제1항에 있어서, 혼성단량체가 스티렌 70∼98중량부, 친수성 단량체 2∼30중량부이고 여기에, 가교제 1∼3중량부, 전해질 0.1∼1중량부, 유화제 1∼5중량부, 소포제 0.01∼0.1중량부, 중합개시제 1∼3중량부를 사용하였고, 상기 가교제를 5∼10wt%의 혼성단량체 용액에 첨가한 후 온도를 중합 개시온도로 상승시키고 개시제를 첨가하여 중합을 개시하여 약 5∼10분 경과 후 90∼95wt%의 잔여 혼성단량체를 투입하여 중합시키는 스티렌계 유화 공중합체 라텍스의 제조방법.The method according to claim 1, wherein the hybrid monomer is 70 to 98 parts by weight of styrene, 2 to 30 parts by weight of hydrophilic monomer, wherein 1 to 3 parts by weight of crosslinking agent, 0.1 to 1 part by weight of electrolyte, 1 to 5 parts by weight of emulsifier, and antifoaming agent 0.01. To 0.1 parts by weight and 1 to 3 parts by weight of a polymerization initiator were used, and the crosslinking agent was added to a 5 to 10 wt% hybrid monomer solution, and then the temperature was raised to the polymerization start temperature and the initiator was added to initiate polymerization. A process for producing a styrene-based emulsion copolymer latex which is polymerized by adding 90 to 95 wt% of a remaining copolymer after a minute. 제5항에 있어서, 유화제가 알킬화디페닐옥사이드디술포네이트 또는 도데실 벤젠 술포닐산 나트륨이고 전해질이 피로포스페이트산나트륨 또는 인산인 스티렌계 유화 공중합 라텍스를 제조하는 방법6. The process of claim 5 wherein the emulsifier is alkylated diphenyloxide disulfonate or sodium dodecyl benzene sulfonate and the electrolyte is sodium pyrophosphate or phosphoric acid. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950003462A 1995-02-22 1995-02-22 Method for preparing styrene emulsion copolymer having small particle size and narrow distribution KR960031484A (en)

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